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1. A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have?

1. A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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The image depicts a schematic diagram of a three-phase stator winding configuration for an electric motor. It is labeled as "Figure 8." ### Explanation: - **Circular Arrangement**: The diagram shows a circular layout representing the stator of an electric motor. - **Coils and Windings**: Around the circle, multiple winding slots are filled with coil representations. Each line with a squiggly line and circle represents an individual coil within a slot. - **Phases**: The windings are grouped into three distinct sections, labeled L1, L2, and L3, which represent the three phases of the stator winding. Each phase consists of a set of coils that are spaced equally around the circle. - **Flow Direction**: Arrows indicating L1, L2, and L3 phase directions suggest the electrical connections and current flow for each phase. This configuration is typical for three-phase AC motors, ensuring efficient and balanced operation. This arrangement helps in creating a rotating magnetic field necessary for motor operation.
Transcribed Image Text:The image depicts a schematic diagram of a three-phase stator winding configuration for an electric motor. It is labeled as "Figure 8." ### Explanation: - **Circular Arrangement**: The diagram shows a circular layout representing the stator of an electric motor. - **Coils and Windings**: Around the circle, multiple winding slots are filled with coil representations. Each line with a squiggly line and circle represents an individual coil within a slot. - **Phases**: The windings are grouped into three distinct sections, labeled L1, L2, and L3, which represent the three phases of the stator winding. Each phase consists of a set of coils that are spaced equally around the circle. - **Flow Direction**: Arrows indicating L1, L2, and L3 phase directions suggest the electrical connections and current flow for each phase. This configuration is typical for three-phase AC motors, ensuring efficient and balanced operation. This arrangement helps in creating a rotating magnetic field necessary for motor operation.
### Questions on Synchronous Generators 1. **A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have?** a) 4 b) 12 c) 18 d) none of the above 2. **A)** How many cycles are generated in one revolution of a 24-pole AC generator? a) 5 b) 12 c) 300 d) none of the above **B)** How many revolutions per second must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above **C)** How many revolutions per minute must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above
Transcribed Image Text:### Questions on Synchronous Generators 1. **A diesel-driven synchronous generator is operated at 400 rpm and has a frequency rating of 60 Hz. How many poles does it have?** a) 4 b) 12 c) 18 d) none of the above 2. **A)** How many cycles are generated in one revolution of a 24-pole AC generator? a) 5 b) 12 c) 300 d) none of the above **B)** How many revolutions per second must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above **C)** How many revolutions per minute must it make to generate a frequency of 60 Hz? a) 5 b) 12 c) 300 d) none of the above
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